install express node code example

Example 1: install express

$ npm install express --save

Example 2: express hello world

//to run : node filename.js
const express = require('express')
const app = express()
const port = 3000

app.get('/', (req, res) => res.send('Hello World!'))

app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))

//visit localhost:3000
// assuming you have done 1) npm init 2) npm install express

Example 3: install express globally

$ npm install express --no-save

Example 4: install express

npm i express

Example 5: setup node js express basic setup

npm init -y
npm i express

Example 6: node express setup

yarn add express 
yarn add --dev @types/express